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Date: Wed, 13 Mar 2013 20:10:25 +0100
Message-ID: <CA+icZUUPTryfL9S2vHopPTcRkhV=Qxd1w_fh0mWbPrUE7Lw=zQ@mail.gmail.com>
Subject: Re: [PATCH 0/9] overlay filesystem: request for inclusion (v17)
From: Sedat Dilek <sedat.dilek@gmail.com>
To: Felix Fietkau <nbd@openwrt.org>
Cc: Robin Holt <holt@sgi.com>, Miklos Szeredi <miklos@szeredi.hu>,
        viro@zeniv.linux.org.uk, torvalds@linux-foundation.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        hch@infradead.org, akpm@linux-foundation.org, apw@canonical.com,
        neilb@suse.de, jordipujolp@gmail.com, ezk@fsl.cs.sunysb.edu,
        dhowells@redhat.com, sedat.dilek@googlemail.com, hooanon05@yahoo.co.jp,
        mszeredi@suse.cz
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On Wed, Mar 13, 2013 at 7:37 PM, Felix Fietkau <nbd@openwrt.org> wrote:
> On 2013-03-13 7:12 PM, Robin Holt wrote:
>> On Wed, Mar 13, 2013 at 05:51:33PM +0100, Sedat Dilek wrote:
>>> On Wed, Mar 13, 2013 at 5:21 PM, Miklos Szeredi <miklos@szeredi.hu> wrote:
>>> > On Wed, Mar 13, 2013 at 5:10 PM, Sedat Dilek <sedat.dilek@gmail.com> wrote:
>>> >
>>> >> Anyway, with CONFIG_OVERLAYFS_FS=m I do not see any related messages
>>> >> when the kernel-module is loaded.
>>> >> So, is this intended?
>>> >> SquashFS prints into the logs, so what is it doing differently?
>>> >
>>> > Some modules do, some don't.  It's not compulsory and not very useful.
>>> >
>>>
>>> What about...
>>>
>>> diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
>>> index 482c26f..92b9ad5 100644
>>> --- a/fs/overlayfs/super.c
>>> +++ b/fs/overlayfs/super.c
>>> @@ -675,11 +675,13 @@ MODULE_ALIAS_FS("overlayfs");
>>>  static int __init ovl_init(void)
>>>  {
>>>         return register_filesystem(&ovl_fs_type);
>>> +       printk(KERN_INFO "overlayfs: loaded\n");
>>
>> How about pr_debug().  That makes things quite for most of us but gives
>> you info when looking for things like boot problems.
> How is having a printk/pr_debug useful here at all? The fact that other
> filesystems do this as well is not a good reason...
> Also, putting it *after* the return statement doesn't make much sense ;)
>

Hehe, I just checked my new kernel... that does not work (nothing in the logs).
But I think it's good to see if the filesystem is registered/loaded.

- Sedat -

> - Felix
>
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